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What would a rainbow be like on Tatooine? (www.youtube.com)

submitted 1 month ago by schnurrito@discuss.tchncs.de to c/xkcd@lemmy.world

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[–] captain_aggravated@sh.itjust.works 3 points 1 month ago (1 children)

Can other things like fine sand refract rainbows?

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[–] Redjard@reddthat.com 3 points 1 month ago

Sand isn't round enough, nor are most grains clear. You'd need perfect clear quartz beads.
And then the index of refraction would be different, so the rainbow would be all messed up.

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